First beat the gym leader for the 1st badge then go to the cave on root 116 (rusturf tunnel) then go back to route 104 and go into the sailor guys house he should take you to Dewford Town!!! Hope this helpd :)
The next 'city' is the Pokemon League. To get to it you need to use a Pokemon that can know surf, then you go to the beach north of sunny shore city. Surf on that pokemon, while continuing north. Eventually, after facing a few trainers, you will reach a waterfall, climb this and then you are the beginning of victory road.
After you beat the gym leader go up to the building with three trees blocking it. You have to use cut on one of the three trees then go into the building and battle your way through until you reach the grunt that has stolen a Clarafary if I remember correctly. You battle her then you go to the bicycle store (you can't miss it because it's right next to the bikes) talk to the counter guy who thanked you for saving his Pokemon and he'll give you a bike then go into the building where there is an old man and he'll give you the explorer kit. He'll ask you if you're up for his tasks but you don't have to do them. Just go to the building in Eterna City that is south and you'll be out but you'll be challenged by trainers on the bicycle road on the way.
go to the east side of the city and then go north. you will find chargestone cave. go through it and you will find the next city.
Timer balls are sold in the rustboro city pokemart.
I have Pokemon™ Ruby™ and the trainer Roxanne is leader of a Rustboro city.In Pokemon™ Saphire™ is Roxanne in Rustboro city too. Rustboro city is on the west of Hoenn™ (PKMN™ Saphire™, Ruby™ and Emerald™ world)
There is no Devon Corporation in Pokemon diamond. However, there is on Pokemon ruby,sapphire and emerald. It's in Rustboro City.
You get cut in the first house on the left as you enter rustboro city for the first time. He is known as the cut master. If you go to the pokemon school you always get tips on where to go
A woman in Rustboro City. She will give you a Makuhita nicknamed Makit that is the same level as the slakoth you give her.
house next to the Pokemon center
in rustboro city
Find the HM (in the building next to the Pokemon centre in rustboro city) and use it in the menu
Rustboro city
in the cutter house in rustboro city
it is in rustboro city near Pokemon center
the biggest building in Rustboro city. it is in the west of the city
Timer balls are sold in the rustboro city pokemart.
It is in Rustboro city. Look around.
I am pretty sure it is Rustboro City in the PokeMart.
I have Pokemon™ Ruby™ and the trainer Roxanne is leader of a Rustboro city.In Pokemon™ Saphire™ is Roxanne in Rustboro city too. Rustboro city is on the west of Hoenn™ (PKMN™ Saphire™, Ruby™ and Emerald™ world)
he is in rustboro city near the Pokemon center is haus. in haus he is.